The temperature on October 1, 1911 was between 5.2 °C and 14.1 °C and averaged 9.6 °C. There was 12.7 mm of rain. There was 5.1 hours of sunshine (44%). The average windspeed was 6 Bft (strong wind) and was prevailing from the north-northwest. Source: KNMI
January 26 » Glenn Curtiss flies the first successful American seaplane.
May 30 » At the Indianapolis Motor Speedway, the first Indianapolis 500 ends with Ray Harroun in his Marmon Wasp becoming the first winner of the 500-mile auto race.
July 4 » A massive heat wave strikes the northeastern United States, killing 380 people in eleven days and breaking temperature records in several cities.
August 1 » Harriet Quimby takes her pilot's test and becomes the first U.S. woman to earn an Aero Club of America aviator's certificate.
August 24 » Manuel de Arriaga is elected and sworn-in as the first President of Portugal.
December 29 » Mongolia gains independence from the Qing dynasty, enthroning 8th Jebtsundamba Khutughtu as Khagan of Mongolia.
When copying data from this family tree, please include a reference to the origin: Elly Gelderman, "Family tree Gelderman", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-gelderman/I16640.php : accessed February 12, 2026), "Frans Hengeveld (1911-)".
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